In the Linux kernel, the following vulnerability has been resolved:<\/p>\n
drm\/amdkfd: Fix OOB memory exposure in get_wave_state()<\/p>\n
The get_wave_state() function for v9 trusts cp_hqd_cntl_stack_size and
\ncp_hqd_cntl_stack_offset values read directly from the MQD, which are
\nwritten by GPU microcode and fully attacker-controlled on the
\nCRIU-restore path (via AMDKFD_IOC_RESTORE_PROCESS with H3).<\/p>\n
this leads to an unbounded copy_to_user() that can leak adjacent
\nGTT\/kernel memory. If offset > size, integer underflow produces a ~4 GiB
\nread length, if size is set to 1 MiB against a 4 KiB allocation, we leak
\n1 MiB of adjacent kernel memory (other queues’ MQDs, ring buffers, KASLR
\npointers).<\/p>\n
Fix by clamping both cp_hqd_cntl_stack_size to the actual allocated
\nbuffer size (q->ctl_stack_size) and cp_hqd_cntl_stack_offset to the
\nclamped size before performing arithmetic and copy_to_user().<\/p>\n
This ensures we never read beyond the allocated kernel BO regardless of
\nattacker-supplied MQD field values.<\/p>\n","protected":false},"excerpt":{"rendered":"
In the Linux kernel, the following vulnerability has been resolved:<\/p>\n
drm\/amdkfd: Fix OOB memory exposure in get_wave_state()<\/p>\n
The get_wave_state() function for v9 trusts cp_hqd_cntl_stack_size and
\ncp_<\/p>\n","protected":false},"template":"","meta":[],"categories":[],"tags":[],"class_list":["post-28728","vuln","type-vuln","status-publish","hentry"],"_links":{"self":[{"href":"https:\/\/www.54iter.cn\/index.php?rest_route=\/wp\/v2\/vuln\/28728","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.54iter.cn\/index.php?rest_route=\/wp\/v2\/vuln"}],"about":[{"href":"https:\/\/www.54iter.cn\/index.php?rest_route=\/wp\/v2\/types\/vuln"}],"wp:attachment":[{"href":"https:\/\/www.54iter.cn\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=28728"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.54iter.cn\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=28728"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.54iter.cn\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=28728"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}